Bassett L W, Grover J S, Seeger L L
Department of Radiological Sciences, UCLA School of Medicine 90024.
Skeletal Radiol. 1990;19(6):401-5. doi: 10.1007/BF00241788.
This article reviews the magnetic resonance (MR) appearance of normal knee anatomy and the role of MRI in the evaluation of knee trauma. Images acquired in the sagittal plane are the most useful. A combination of T1- and T2-weighted spin echo pulse sequences is most commonly employed. A meniscal tear is identified by an intrameniscal signal which extends to the joint surface. MR and arthroscopic findings agree in more than 90% of patients. It is important to be familiar with the MRI appearance of normal anatomic variants that may be confused with meniscal tears: the transverse geniculate ligament, the hiatus of the popliteal tendon sheath, and the meniscofemoral ligaments. Tears in the anterior cruciate, posterior cruciate, and collateral ligaments are also depicted.
本文回顾了正常膝关节解剖结构的磁共振（MR）表现以及MRI在膝关节创伤评估中的作用。矢状面获取的图像最有用。最常采用T1加权和T2加权自旋回波脉冲序列的组合。半月板撕裂通过延伸至关节面的半月板内信号来识别。在超过90%的患者中，MR和关节镜检查结果一致。熟悉可能与半月板撕裂混淆的正常解剖变异的MRI表现很重要：横膝状韧带、腘肌腱鞘裂孔和半月板股骨韧带。前交叉韧带、后交叉韧带和侧副韧带的撕裂也能显示出来。
